
PRODUCT DETAILS
The G-SHOCK GBD-300-9 from the G-SQUAD series is built with practical workout functionality including an accelerometer, distance tracking, Auto Lap, and Smartphone Link connectivity. Its shock-resistant construction features the slimmest profile in the G-SQUAD lineup, complemented by a soft bio-based resin band with 5 mm hole spacing for precise sizing.
Equipped with a high-resolution Memory-in-Pixel (MIP) LCD and Super Illuminator auto-light, the display ensures optimal visibility during day or night training sessions. Bluetooth connectivity enables distance calibration using smartphone GPS, automatic time adjustment, activity tracking via the CASIO WATCHES app, and vibration alerts for milestones and notifications.
Engineered for endurance and everyday activity, the watch delivers 200-meter water resistance and runs for approximately 2 years on a CR2032 battery.
Key Features
| Case size (L× W× H) | 48.9 × 47.4 × 14.9 mm |
| Weight | 60 g |
| Case and bezel material | Resin / Bio-based resin |
| Band | Bio-based resin band |
| Construction | Shock Resistant |
| Water resistance | 200-meter water resistance |
| Time adjustment | Bluetooth: Connects to a smartphone and automatically adjusts the time |
| Power supply and battery life | Approx. battery life: 2 years on CR2032 |
| Sensor feature | Training Function Display of distance, speed, pace, and other calculated values based on accelerometer, auto/manual lap times, Auto Pause, target alert setting (time, calories burned) on/off, training display customization |
| Smartphone Link feature | Mobile link (Automatic connection, wireless linking using Bluetooth®) |
| Apps | CASIO WATCHES |
| App connectivity feature | Auto time adjustment, Easy watch setting, Approximately 300 world time cities, Notification function, Activity history, Life log data, Distance correction by smartphone GPS, Phone finder |
| Glass | Mineral Glass |
| Compatible band size | 145 to 215 mm |
| World time | World time 38 time zones (38 cities + coordinated universal time), daylight saving on/off, auto summer time (DST) switching |
| Stopwatch | 1-second stopwatch (Measuring capacity: 99:59'59'') |
| Timer | Countdown timer for interval measurement (up to five time settings) |
| Alarm/hourly time signal | 4 daily alarms with snooze |
| Light | LED backlight (Super Illuminator) Auto light switch, selectable illumination duration (1.5 seconds or 3 seconds), afterglow |
| Calendar | Full auto-calendar (to year 2099) |
| Accuracy | ±15 seconds per month (with no mobile link function) |
Highlights
- Shock resistant
- 20 bar water resistant
- Accurate timekeeping
- Suitable for runners
- Tracks training performance
- Sporty design
Downloads
Frequently asked questions
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PAYMENT METHODS

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SHIPPING & RETURNS
DELIVERY
- We aim to dispatch all in-stock items from our warehouse within 2-5 business days. An email will be sent to you which will include all your tracking information once your order has been handed over to our courier partner.
- If an item is out of stock, we will email you as soon as possible to arrange a full refund or exchange.
- FREE shipping for all orders to any South African address.
- International delivery to Zimbabwe, Namibia and Botswana is available for some brands. Please contact us for a shipping quote.
- Easy 7 days returns and exchanges
RETURNS
If you do not like the product you can return it within 7 days, assuming the item is not worn, scratched or damaged in any way, and includes all the original packaging.
Please contact us for any returns or exchanges
WATER RESISTANCE
Please check the marking on the back of your watch case and refer to the following table to confirm the degree of water resistance of your watch and the preferable conditions of use. A watch’s water resistance is not permanently guaranteed. It is affected by the ageing of gaskets or deformation of watch parts due to accidental shock. To preserve a watch’s water resistance as long as possible, please follow the precautions below:
- Wipe off moisture, sweat or dirt with a soft dry cloth after removing it from the wrist in order to increase the durability of the case back, gaskets and band.
- After using a water resistant watch in ocean water, wash it in fresh water and dry it with a soft cloth.
- Do not wash a water resistant watch while the crown is pulled out.
- Do not operate the crown or press a button when the watch is wet.
- A periodic overhaul service is recommended to check the water resistance of the watch regularly to ensure it’s functionality.
〇:OK,  ✕:Not OK
Type of water resistance | For saturation diving | For scuba diving | Enhanced water resistance for | Water resistance for | Non-water resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Water resistance | Professional Diver's Watch | Diver's watch | 20 | 10 | 5 | 3 | ||||||||
Usage example | Accidental splashes and Contact with rain |   〇 |   〇 | 〇 | 〇 | 〇 |   〇 |   × | ||||||
Swimming, Yachting, |   〇 |   〇 | 〇 | 〇 | 〇 |   × |   × | |||||||
Skin diving |   〇 |   〇 | 〇 | 〇 | × |   × |   × | |||||||
Scuba diving |   〇 |   〇 | × | × | × |   × |   × | |||||||
Saturation Diving |   〇 |   × | × | × | × |   × |   × | |||||||
REVIEWS
Casio G-Shock Black Dial Digital Watch GBD-300-9DR
WHY BUY FROM US?
- AUTHORISED ONLINE DEALERThe Watch Boutique is an authorised online stockist for all brands.  This includes a full international warranty.
- FREE AND FAST DELIVERYShipping is free for all orders in South Africa. We dispatch all orders within 2-5 business days.
- SECURE PAYMENT OPTIONSIncluding Buy Now, Pay Later plans with PayFlex and Pay Just Now.
- AFTER-SALES SERVICEWe have a full on-site watch repair workshop to take care of all after-sales needs.
